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  • Learn Fundamentals of Silverlight 4 Data Binding

    - by Eric J.
    I'm just starting to work with Silverlight (no WPF experience either) and am having a difficult time finding a source that provides a full explanation of Data Binding. There is absolutely no lack of tutorials (starting with the ones on Silverlight.net or Scott Gu's blogs), but everything I have found is "by example". Is there a resource that explains how data binding works in Silverlight, from a Fundamental/Conceptual perspective, and provides end-to-end coverage of data binding features? The desire for a more fundamental source of information is driven by a number of questions that came up this afternoon in reviewing tutorials and writing sample apps, such as: Why can't I bind the value of a slider like this?: Value="{Binding=Age, Mode=TwoWay}" where Age refers to an int property in the object data context I bind in code-behind (the Visual Studio error message is Expected '[]'. How do I use the DataContext property in VS 2010? What's a Path, Relative Source, Static Source, ...?

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  • More than one Custome control are not working properly

    - by Kamlesh
    Hello Developers, I have developed a ASP.Net Server custom control in C# for 3.5. named "myCheckBoxList" inherited from CheckBoxList web control. Working is very simple. It just works as a two option buttons. I have taken a CheckBoxList which will show two fixed checkboxes always. When I check one checkbox then another will uncheck as vise versa. This control works perfectly only when I have placed only one instance of that control on web page. If I place more than one instance of control then it doesnt works. Please, I need solution from expert minds from developers as stackoverflow users.

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  • cross-domain data with AJAX using JSONP

    - by kooshka
    I'm trying to get data from Geobytes. One of the templates returns JSON and I need to cross-domain access it. I wrote these 2 functions function getCountry(ip) { var surl = "http://www.geobytes.com/IpLocator.htm?GetLocation&template=json.txt"; $.ajax({ url: surl, data: '{"ipaddress":"' + ip + '"}', dataType: "jsonp", jsonp: "callback", jsonpCallback: "jsonpcallback" }); } function jsonpcallback(rtndata) { alert(rtndata.message); } The call is executed but I get 1 warning: Resource interpreted as Script but transferred with MIME type text/html: "http://www.geobytes.com/IpLocator.htm?GetLocation&template=json.txt&callback=jsonpcallback&{%22ipaddress%22:%22200.167.254.166%22}&_=1353148931121" 1 Error: Uncaught SyntaxError: Unexpected token : The error is thrown on the returned data at {"geobytes":{"countryid":117, I think is maybe because it's 117 and not "117" but I obviously can't control the returned data How can I fix these 2 issues?

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  • Documenting and defining content types for a CMS or similar project

    - by Rimian
    I'm writing up some documentation on a Drupal project and my task is to define the content types and their attributes. The intended audience is project managers and developers. So it could be a high level document that gives an overview of the system. (I think that's how I describe it: high level rather than high detail) At the moment I'm using open office and bullet points but it seems like an amateurish method when I need to describe details that could be useful for a developer (me). Something like UML would describe detail but is probably more complicated than I need right now and could be too technical for others on the team. Are there any universal methods or templates that I can use to describe information in this case?

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  • Migrate Data and Schema from MySQL to MSSQL

    - by colithium
    Are there any free solutions for automatically migrating a database from MySQL to MSSQL Server that "just works"? I've been attempting this simple (at least I thought so) task all day now. I've tried: MSSQL Server Management Studio's Import Data feature Create an empty database Tasks - Import Data... .NET Framework Data Provider for Odbc Valid DSN (verified it connects) Copy data from one or more tables or views Check 1 VERY simple table Click Preview Get Error: The preview data could not be retrieved. ADDITIONAL INFORMATION: ERROR [42000] [MySQL][ODBC 5.1 Driver][mysqld-5.1.45-community]You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '"table_name"' at line 1 (myodbc5.dll) A similar error occurs if I go through the rest of the wizard and perform the operation. The failed step is "Setting Source Connection" the error refers to retrieving column information and then lists the above error. It can retrieve column information just fine when I modify column mappings so I really don't know what the issue is. I've also tried getting various MySql tools to output ddl statements that MSSQL understand but haven't succeeded. I've tried with MySQL v5.1.11 to SQL Server 2005 and with MySQL v5.1.45 to SQL Server 2008 (with ODBC drivers 3.51.27.00 and 5.01.06.00 respectively)

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  • WCF data service hosting in Windows Form

    - by user158598
    Hi, I want to host a WCF Data Service (formerly known as ADO.NET data Service) in windows form.Is it possible? If yes,then is there any blog, which talks about it? I know WCF can be hosted in Windows Form, but I am not sure about WCF data service, as all the examples I see, is asking to create ASP.NET web project. -Brajesh

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  • receiving data from serialport stops when main form is minimized or moved

    - by Rahul
    Sir, I apologize if this is already covered somewhere. I did a search and find something which I have already implemented. I am developing an application which receives data from a device connected via serialport. I am using SerialPort datareceived event to capture data. I am to display data in text boxes of the main form. Data is received frequently. I used Timer to send command to the device, in response device send some data. Timer interval is 100 ms. In every 100 ms interval some command is sent and correspondingly data is received. I used Invoke function to update the GUI elements like TExtbox, labels etc. Everything is fine. All the elements are updating beautifully. But during receiving data if I make any change in main form like moving form, minimizing, maximizing, or clicking somewhere in the form, then data receiving stops. I couldnot find the reason why its happening ? I also changed the timer interval to 200,300,400,500 but same problem is there. Please tell me why its happening? And possible solution... Thanks In advance.... :)

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  • Creating an Excel Template for different data size

    - by dassouki
    I created an excel template for a file i've done for a routine work calculation. The file takes data from the data logger and does some analysis on it and outputs one number regardless of the input size. The problem I'm having is i have to modify the sheet to suit the number of rows, as everyday the data logger outputs a different number of rows. there are about 15 sheets in the workbook and it's annoying to have to change everyone of them everyday. What i'd like to do input the data logger csv, and boom the result gets outputted. Is there a way through vba or not to ahieve

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  • Ad-hoc retreival of data from SQL Server varbinary column

    - by Daniel Fortunov
    I would like to retreive some binary data from a varbinary(max) column in a SQL Server database for debugging purposes. What is the easiest way to get this data into a local binary file, preferably without having to write a throw-away console application? I have tried using SQL Server Management Studio but this returns a hex encoded binary string, rather than raw binary data (even with the "results to file" option).

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  • RAII: Initializing data member in const method

    - by Thomas Matthews
    In RAII, resources are not initialized until they are accessed. However, many access methods are declared constant. I need to call a mutable (non-const) function to initialize a data member. Example: Loading from a data base struct MyClass { int get_value(void) const; private: void load_from_database(void); // Loads the data member from database. int m_value; }; int MyClass :: get_value(void) const { static bool value_initialized(false); if (!value_initialized) { // The compiler complains about this call because // the method is non-const and called from a const // method. load_from_database(); } return m_value; } My primitive solution is to declare the data member as mutable. I would rather not do this, because it suggests that other methods can change the member. How would I cast the load_from_database() statement to get rid of the compiler errors?

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  • Communicating from website to desktop application (not vice-versa)

    - by chakrit
    I am designing an application such that it will have to react to certain actions required by the website, mostly the same way Last.FM client does (if you have used one) The way Last.FM client works is that, it will register a custom protocol in Windows (lastfm://) and on their website, they use that protocol to trigger certain action on the player, e.g.: lastfm://artist//similarartists will actually direct any Last.FM client running to load up similar artists. I would like to do the same thing for my application. Is this a good idea? Is there any good alternatives to send a message from a website to a desktop client in this manner?

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  • Is there a java library equivalent to `file` command in unix

    - by Shervin
    Is there any java libraries that is similar to unix's command file? ie: $ file somepicture.png somepicture.png PNG image, 805 x 292, 8-bit/color RGB, non-interlaced The file command is such a nice tool. I need something that can tell me if the file is really what I want it to be. (ie a picture, document etc) I know I can run the command file, but I am looking for a java library, not running the actual unix command.

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  • Adding Silverlight MimeType using adsutil

    - by Rich
    I have a script that creates an app pool, web site - and then I want to use adsutil to add the .xap MimeType. I see this: cscript adsutil.vbs set W3SVC//Root/MimeMap “.extension,mimetype” However, since I am creating the web site in the same script I will not know the ID. Would anyone know how to do this with adsutil? Thanks, Rich

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  • POST with curl without sending data

    - by Marcus
    Is there a way to use curl to send a POST request without sending any data? We usually post like: curl --data @C:\mydata.txt http://1.2.3.4/myapi If you omit the --data you are doing a GET. How can you omit it and still do a POST?

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  • Preventing concurrent data modification in Web based app

    - by Manoj
    Hi, I am building a web app in Silverlight which allows users to view and edit a database. In order to prevent multiple users from editing the same data, I was thinking of implementing a lock and key mechanism, so that other users are made to wait when one particular user is editing the data. Is there any way in which we can have variable(flag specifying if a user is editing data) in the server which can be shared across multiple clients? Is there a better way to manage this type of conurrent data access issues?

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  • 'How decode my encode xml data?

    - by Alex
    Hi <% 'Stage 1 datas=Server.URLencode("<PaginationData currentPage=""1"" totalPages=""9""/>") response.write "Encode = " datas &"</br></br>" 'Stage 2 response.write "Decode = " 'How i again decode my encode data? %> In the "Stage 1" , i encode my xml data In the "Stage 2", How i decode the "Stage 1" Encode data? hoping your support

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  • Problem convert column values from VARCHAR(n) to DECIMAL

    - by Kevin Babcock
    I have a SQL Server 2000 database with a column of type VARCHAR(255). All the data is either NULL, or numeric data with up to two points of precision (e.g. '11.85'). I tried to run the following T-SQL query but received the error 'Error converting data type varchar to numeric' SELECT CAST([MyColumn] AS DECIMAL) FROM [MyTable]; I tried a more specific cast, which also failed. SELECT CAST([MyColumn] AS DECIMAL(6,2)) FROM [MyTable]; I also tried the following to see if any data is non-numeric, and the only values returned were NULL. SELECT ISNUMERIC([MyColumn]), [MyColumn] FROM [MyTable] WHERE ISNUMERIC([MyColumn]) = 0; I tried to convert to other data types, such as FLOAT and MONEY, but only MONEY was successful. So I tried the following: SELECT CAST(CAST([MyColumn] AS MONEY) AS DECIMAL) FROM [MyTable]; ...which worked just fine. Any ideas why the original query failed? Will there be a problem if I first convert to MONEY and then to DECIMAL? Thanks!

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  • Custom Grid LINQ to SQL help

    - by user488361
    Following is my custome cotrol grid... public partial class LinqGrid : UserControl { object tmpDataTable = new object(); public LinqGrid() { InitializeComponent(); } public void Bind(System.Data.Linq.Table listSource) where T : class { Project.dbClassesDataContext dbc = new Project.dbClassesDataContext(); tmpDataTable = listSource; var query = (from c in listSource select c); dgvRecords.DataSource = query.Take(10).ToList(); } private void btnNext_Click(object sender, EventArgs e) { // now what i have to do here if i want next 10 records.....means how to retrive tmpDataTable object here... ??? i can't find Type of variable....?? plz help me.... } }

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  • Write data to SQL Server directly from BizTalk or use external service?

    - by dlongest
    An external source will be sending us XML data that BizTalk will pick up and transform into an internal schema. We need this data to be loaded into a SQL Server database as we're going to expose some of the data to our web front-end via a custom WCF service. The question is: what is the recommended approach for doing something like this? Options we're considering are having BizTalk write to the database directly or having BizTalk call a custom WCF service which would handle the save operation. Another briefly considered idea was having BizTalk write to an MSMQ and have a custom service pull from there and store it in the database. What are some of the guidelines or questions that should be asked in assessing these options? There are concerns related to overhead from calling the extra service, duplication of efforts if the schema is modified in the future (which it will be to some extent), and simply the best way to design within a service-oriented architecture that we're struggling with.

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  • Qt compilation and stylesheet

    - by Yosko
    Each time I compile my Qt project after modifying my qss stylesheet file, the modifications aren't taken into account, unless I rebuild everything. Any idea on a workaround for this, so that I don't have to wait 5 minutes each time I change my qss ? Notes: I use Qt 4.8, and my stylsheet is declared in a resource file (qrc). EDIT: As suggested by Luca Carlon, when a qss is reference in the project through a .qrc file, the changes in the qss don't affect the qrc, and the compiler ignores it. To avoid that, I added a Custom Build Step to my project: before the qmake step! calls a .bat file without any argument the .bat contains the real command copy /b files.qrc +,,

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  • Custom membership provider via WCF authorization question

    - by Diego
    I've made a global authentication via WCF to use with the most of our systems, but found that load data via WCF not very so fast. What I need to do now is verify every time that the page is loading if the user has access granted to that page.... Its a good pratice to go back in WCF request this info for every page that the user access?This will not slow down my entire system?

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  • Why doesn't my binding update whenever EditingElementStyle AND ElementStyle are set to a custom styl

    - by Pakman
    In my Visual Studio 2010 WPF application, I have the following (simplified) style: <Style x:Key="MyStyle" TargetType="{x:Type CheckBox}"> <Setter Property="Background" Value="Blue" /> </Style> If I use it as the ElementStyle AND EditingElementStyle in my DataGridCheckBoxColumn: <DataGridCheckBoxColumn Binding="{Binding IsEnabled}" ElementStyle="{StaticResource MyStyle}" EditingElementStyle="{StaticResource MyStyle}" /> Then my binding, IsEnabled, does not toggle when I check/uncheck a row's checkbox. If I remove either ElementStyle, EditingElementStyle, or both, then the binding updates no problem. Why is this?! Note: sometimes clicking around will produce an update to the binding (detected via debugging) - this is not the same as clicking another row to "commit" the value, though! Thanks!

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  • Why does Python array moduel handle strings and lists differently?

    - by Casey
    I'm having trouble understanding the result of the following statements: >>> from array import array >>> array('L',[0xff,0xff,0xff,0xff]) array('L', [255L, 255L, 255L, 255L]) >>> from array import array >>> array('L','\xff\xff\xff\xff') Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: string length not a multiple of item size

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